Answer:
b) 0.5 N
Explanation:
From coulomb's law,
F = kq'q/r².................... Equation 1
Where F =force of repulsion between the charges, q' = first charge, q = second charge, r = distance between the charges, k = proportionality constant.
q'q = Fr²/k........................... Equation 2
Given: F = 2 N, r = 1 m, k = 9.0×10⁹ Nm²/C²
Substituting into equation 2
q'q = 2(1)²/(9.0×10⁹)
q'q = 2/9.0×10⁹ C².
If the distance between the charges is increased to 2 meters,
r = 2 m, q'q = 2/9.0×10⁹ C².
Substitute into equation 1
F = 9.0×10⁹(2/9.0×10⁹)/2²
F = 2/4
F = 1/2 = 0.5 N.
The right option is b) 0.5 N
The total distance traveled by Aliaa using her skateboard for 20 revolution of the wheels is equal to 3770 millimeters.
<u>Given the following data:</u>
Diameter of skateboard = 60 mm.
Number of revolution = 20 revolutions.
Radius = diameter/2 = 60/2 = 30 mm.
<h3>What is distance?</h3>
Distance can be defined as the amount of ground covered (traveled) by a physical object over a specific period of time and speed, regardless of its direction, starting point or ending point.
For one revolution of the wheels, the distance traveled by Aliaa using her skateboard is given by:
Distance = 2πr
Distance = 2 × 3.142 × 30
Distance = 188.5 mm.
Therefore, the total distance traveled by Aliaa using her skateboard for 20 revolution of the wheels is given by:
Distance = 188.5 × 20
Distance = 3770 millimeters.
Read more on distance per revolutions here: brainly.com/question/10989073
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Answer: the sample of solid has less energy than the sample of gas
Explanation:
APEX
This should be dust and gas
